mirror of
https://github.com/h2zero/esp-nimble-cpp.git
synced 2024-12-18 09:10:47 +01:00
2151386057
* General code cleanup * `NimBLEScan::start` will no longer clear cache or results if scanning is already in progress. * `NimBLEScan::clearResults` will now reset the vector capacity to 0. * `NimBLEScan::stop` will no longer call the `onScanEnd` callback as the caller should know its been stopped when this is called. * `NimBLEScan::clearDuplicateCache` has been removed as it was problematic and only for the esp32. Stop and start the scanner for the same effect. * `NimBLEScan::start` takes a new bool parameter `restart`, default `true`, that will restart an already in progress scan and clear the duplicate filter so all devices will be discovered again. * Scan response data that is received without advertisement first will now create the device and send a callback. * Added new method: `NimBLEAdvertisedDevice::isScannable()` that returns true if the device is scannable. * Added default callbacks for `NimBLEScanCallbacks` * `NimBLEScanCallbacks` function signatures updated: * - `onDiscovered` now takes a `const NimBLEAdvertisedDevice*` * - `onResult` now takes a `const NimBLEAdvertisedDevice*` * - `onScanEnd` now takes a `const NimBLEScanResults&` and `int reason` * Added new erase overload: `NimBLEScan::erase(const NimBLEAdvertisedDevice* device)` * `NimBLEScanResults::getDevice` methods now return `const NimBLEAdvertisedDevice*` * `NimBLEScanResults` iterators are now `const_iterator`
45 lines
No EOL
2.2 KiB
C++
45 lines
No EOL
2.2 KiB
C++
/**
|
|
* Continuous Scan Example
|
|
*
|
|
* This example demonstrates how to continuously scan for BLE devices.
|
|
* When devices are found the onDiscovered and onResults callbacks will be called with the device data.
|
|
* The scan will not store the results, only the callbacks will be used
|
|
* When the scan timeout is reached the onScanEnd callback will be called and the scan will be restarted.
|
|
* This will clear the duplicate cache in the controller and allow the same devices to be reported again.
|
|
*
|
|
* Created: on March 24 2020
|
|
* Author: H2zero
|
|
*
|
|
*/
|
|
|
|
#include "NimBLEDevice.h"
|
|
|
|
static constexpr uint32_t scanTime = 30 * 1000; // 30 seconds scan time.
|
|
|
|
class scanCallbacks : public NimBLEScanCallbacks {
|
|
// Initial discovery, advertisement data only.
|
|
void onDiscovered(const NimBLEAdvertisedDevice* advertisedDevice) override {
|
|
printf("Discovered Device: %s\n", advertisedDevice->toString().c_str());
|
|
}
|
|
|
|
// If active scanning the result here will have the scan response data.
|
|
// If not active scanning then this will be the same as onDiscovered.
|
|
void onResult(const NimBLEAdvertisedDevice* advertisedDevice) override {
|
|
printf("Device result: %s\n", advertisedDevice->toString().c_str());
|
|
}
|
|
|
|
void onScanEnd(const NimBLEScanResults& results, int reason) override {
|
|
printf("Scan ended reason = %d; restarting scan\n", reason);
|
|
NimBLEDevice::getScan()->start(scanTime, false, true);
|
|
}
|
|
} scanCallbacks; // create a callback class instance.
|
|
|
|
extern "C" void app_main() {
|
|
NimBLEDevice::init(""); // Initialize the device, you can specify a device name if you want.
|
|
NimBLEScan* pBLEScan = NimBLEDevice::getScan(); // Create the scan object.
|
|
pBLEScan->setScanCallbacks(&scanCallbacks, false); // Set the callback for when devices are discovered, no duplicates.
|
|
pBLEScan->setActiveScan(true); // Set active scanning, this will get more data from the advertiser.
|
|
pBLEScan->setMaxResults(0); // Do not store the scan results, use callback only.
|
|
pBLEScan->start(scanTime, false, true); // duration, not a continuation of last scan, restart to get all devices again.
|
|
printf("Scanning...\n");
|
|
} |